7905399 has 8 divisors (see below), whose sum is σ = 10998912. Its totient is φ = 5041080.

The previous prime is 7905379. The next prime is 7905407. The reversal of 7905399 is 9935097.

It is a happy number.

7905399 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7905399 - 2⁸ = 7905143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7905399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7905379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57217 + ... + 57354.

It is an arithmetic number, because the mean of its divisors is an integer number (1374864).

Almost surely, 2^7905399 is an apocalyptic number.

7905399 is a deficient number, since it is larger than the sum of its proper divisors (3093513).

7905399 is a wasteful number, since it uses less digits than its factorization.

7905399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114597.

The product of its (nonzero) digits is 76545, while the sum is 42.

The square root of 7905399 is about 2811.6541394702. The cubic root of 7905399 is about 199.2085303439.

The spelling of 7905399 in words is "seven million, nine hundred five thousand, three hundred ninety-nine".